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The Sundown Audio X15 v3 D1 has a bigger motor and graduates to the Zv5 coil. So also more linear Xmax. Which Means More output and less distortion and more power handling vs. the Sundown Audio X15 v2 D1 -- the X15 v3 is like 85% of a Z v5 ...

The Sundown Audio X12 v3 D1 has a bigger motor and graduates to the Zv5 coil. So also more linear Xmax. Which Means More output and less distortion and more power handling vs. the Sundown Audio X12 v2 D1 -- the X12 v3 is like 85% of a Z v5 ...